Expected duration: less than 1 week I am looking for a highly capable freelancer to reverse engineer the check digit algorithm in a barcode formula.
I will provide full details via PPH messages, however please be informed that me and my team have been stuck on this problem for a few weeks - it is not a simple solution following any traditional check digit alg such as UPC or EAN. It's possible the alg used is inspired by UPC/EAN, so I would like to work with someone with experience in check digit calculation and/or barcodes.
I have a list of barcodes which work (i.e. have the correct check digit), however currently the only method to find the correct check digit is to test 0-9 manually which won't work long-term. Again, I will provide details if you are suited to the project.
If a solution is found it can be delivered via code in any language or as pseudocode. Python is preferred.
--
The proposed approach:
I send full details of the formula including working examples
The freelancer messages me if they find a solution
I send the freelancer a few barcodes to apply their alg to and they respond with the check digit
I test the barcode with the check digit to confirm it works
Terjemahan Inggris ke Indonesia Category: Content Writing, Copywriting, Data Entry, Editing, English Translation, Indonesian Translator, Language Tutoring, Link Building, Pinterest, Translation Budget: $15 - $25 USD
11-Mar-2026 22:59 GMT
Actor/Actress Wanted Category: Acting, Social Video Marketing Budget: $250 - $750 AUD
11-Mar-2026 22:58 GMT
Video Editing for Bodywork Course Content Category: Adobe Premiere Pro, Audio Editing, Audio Services, DaVinci Resolve, Video Editing, Video Post Editing, Video Production, Video Services Budget: $30 - $250 USD
11-Mar-2026 22:58 GMT
Interactive Word Document Creation Category: Accessibility, Data Entry, Microsoft, Microsoft Office, Microsoft Word, PDF, Word, Word Processing Budget: $30 - $250 USD
11-Mar-2026 22:58 GMT
Daily/ Weekly Fitness Content Video Editor Required Category: Adobe Premiere Pro, CapCut, Content Creation, Final Cut Pro, Instagram Ads, Social Media Marketing, Video Editing, Video Production, Video Services, Videography Budget: $15 - $25 AUD
11-Mar-2026 22:56 GMT
Robotic Manipulation Video Annotation Category: Content Creation, Data Annotating, Documentation, Robotics, Technical Writing, Training Budget: $10 - $20 CAD
Shopify Automation & Roposo Integration Category: API Integration, Automation, HTML, PHP, Shopify, Shopify Development, Shopify Templates, Web Development Budget: ₹600 - ₹1500 INR
11-Mar-2026 22:49 GMT
Social Media Expert for Property Investment Brand Category: Article Writing, Content Creation, Content Writing, Facebook Marketing, Graphic Design, Social Media Management, Social Media Marketing, Video Production Budget: $750 - $1500 AUD
